Pr^(3+):Y_2SiO_5/ZnO-TiO_2/ACF复合材料的制备及其光催化性能  

Preparation and Photocatalytic Performance of Pr^(3+):Y_2SiO_5/ZnO-TiO_2 Composites Deposited on Activated Carbon Fiber

作　　者：徐萌川 王亚淼 杨毅[1,2] 焦岩[2] 刘颖[1] 颜学武[1] 

机构地区：[1]南京理工大学环境与生物工程学院,江苏南京210094 [2]南京信息工程大学环境科学与工程学院江苏省环境净化材料工程技术研究中心,江苏南京210044

出　　处：《精细化工》2017年第5期488-493,共6页Fine Chemicals

基　　金：江苏省环境净化材料工程技术研究中心开放基金项目(KFK1504);江苏省产学研前瞻性联合研究项目(BY2016004-02);江苏高校优势学科建设工程资助项目(PAPD)~~

摘　　要：采用溶胶-凝胶法将ZnO掺杂进荧光粉/TiO_2体系,并以活性炭纤维(ACF)为载体,制备了Pr^(3+)∶Y_2SiO_5/ZnO-TiO_2/ACF复合材料。采用XRD、SEM、EDS、FS和UV-vis DRS,对材料的结构及性能进行了表征,并以亚甲基蓝为模拟降解物,考察了ZnO掺杂量对复合材料可见光催化性能的影响。结果表明,当ZnO掺杂质量为TiO_2质量的10%时,制得的复合材料光催化性能最强,在500 mL质量浓度为15 mg/L的亚甲基蓝溶液中反应12 h后亚甲基蓝去除率高达98.0%,反应符合拟一级动力学方程,反应速率常数为0.341 3 h^(-1),是未掺杂ZnO的Pr^(3+)∶Y_2SiO_5/TiO_2/ACF的1.75倍,复合材料重复使用4次后亚甲基蓝去除率仍然保持在85%以上。Pr3＋ ：YzSiOs/ZnO-TiO2/ACF composites were prepared by sol-gel method of anchoring ZnO and upconversion fluorescent material/TiO2 nanocomposites on activated carbon fiber （ACF）. The properties of samples were characterized by XRD, SEM, EDS, FS, and UV-vis DRS. The photocatalytic activity of Pr3＋ ：Y2SiO5/ZnO-TiO2/ACF was evaluated using the degradation of methylene blue solution under visible light irradiation. The effect of doping amount of ZnO on the photocatalytic activity of composite was investigated. The results showed that Pr3＋ ：YzSiO5/ZnO-TiO2/ACF showed the highest visible-light photocatalytic activity in the degradation of methylene blue （500 mL, 15 mg/L） ,when the doping mass fraction of ZnO was 10%. The degradation rate of methylene blue after 12 h irradiation time was as high as 98.0%. The photodegradation followed pseudo first order process and reaction rate constant was 0. 341 3 h-1 ,which was 1.75 times as high as that with Pr3＋ ：Y2SiO5/TiO2/ACF. The degradation rate of methylene blue with pr3＋ ：Y2SiO5/ZnO-TiO2/ACF could still remain above 85% after recycling four times.

关 键 词：上转换 复合半导体 复合材料 吸附 光催化 再生 功能材料 

分 类 号：X788[环境科学与工程—环境工程] TQ426.65[化学工程]